To celebrate the 50th Earth Day, NASA and the LEGO Group have launched the Build a Planet challenge. Given that activity cannot take place in public, the LEGO Group is running the Let\u2019s Build Together campaign and NASA is running the Earth Day at Home campaign. To celebrate the 50th Earth Day, the two initiatives have come together for the Build a Planet one day challenge. Fans are encouraged to build their own LEGO planet and share it on social media. "We\u2019ve teamed up with NASA Earth to celebrate the 50th anniversary of Earth Day. Humanity\u2019s journey beyond Earth has allowed us to better understand our own planet. This knowledge will help shape future exploration of new places in our solar system too,\u201d the LEGO Group said on Facebook. LEGO IDEAS 21321 International Space Station review "During my stay here on the ISS, one of my favourite activities was to look out of the window admire our beautiful home planet, taking a moment to appreciate the extraordinary diversity of ecosystems and life in Earth's cradle," NASA astronaut Jessica Meir said in video message from the Intrnational Space Station, recorded before her return to Earth. To continue to support the work of Brick Fanatics, please buy your LEGO sets from LEGO.com and Amazon using our affiliate links.